These changes of light and season happen both suddenly and gradually, depending on your own perspective and movement in time. Sit still for a while and watch the daylight fade into blackness, and it takes hours. But walk among the trees at dusk, across a soft bed of spruce needles, after a long day on the river, and time speeds up. The pace of the trees, the perspective of the forest takes hold within you, and a good long look into the future looks a lot like the past, with the days and nights rolling into each other, turning in concentric circles, day to night, season to season, through a window of time both small and wide all at once — and all of it happening both here and somewhere else concurrently, though you can’t be sure . . .